http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53110
--- Comment #13 from tejohnson at gcc dot gnu.org 2012-07-25 20:11:23 UTC --- Author: tejohnson Date: Wed Jul 25 20:11:13 2012 New Revision: 189866 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189866 Log: Backport the following patches from trunk to ensure that "andw $0xff, $reg" is always converted to a zero extend to avoid LCP stalls on core2/corei7 (b/6615073): r184891, r186839, r186979, r186993, r188630, r188634, r188648 r184891: 2012-03-04 Uros Bizjak <ubiz...@gmail.com> * config/i386/constraints.md (Ya): New internal constraint. * config/i386/i386.md (zero_extendsidi2): Remove expansion. (*zero_extendsidi2_rex64): Add x,x alternative. (*zero_extendsidi2): Ditto. Add o,0 alternative. Remove flags reg clobber. Adjust corresponding splits. (zero_extend<mode>si2): Macroize expander from zero_extendhisi2 and zero_extendqisi2 expanders using SWI12 mode iterator. (zero_extend<mode>si2_and): Macroize insn from zero_extendhisi2_and and zero_extendqisi2_and. Merge corresponding splitters. (*zero_extend<mode>si2): Macroize insn from *zero_extendhisi2_movzbl and *zero_extendqisi2_movzbl. (*zero_extend*2_movzbl_and): Remove insn patterns. (zero_extendqihi2_and): Merge corresponding splitter. (*zero_extendqihi2): Rename from *zero_extendqihi2_movzbl. (*zero_extend*2_movzbl_and): Remove insn patterns. (*anddi_1): Split TYPE_IMOVX instructions. (*andsi_1): Use Ya for alternative 2. Split TYPE_IMOVX instructions. (*andhi_1): Ditto. (and->zext splitter): Add splitter pattern. (zero extend with andsi3 splitter): Adjust zero_extend pattern. r186839: 2012-04-25 Jakub Jelinek <ja...@redhat.com> PR target/53110 * config/i386/i386.md (and<mode>3): For andq $0xffffffff, reg instead expand it as zero extension. r186979: 2012-04-30 Uros Bizjak <ubiz...@gmail.com> * config/i386/i386.md (and<mode>3): Expand masking operations with 0xff, 0xffff or 0xffffffff immediates to corresponding zero_extend RTX. (and splitter): Split to DImode zero_extend RTX for DImode operand[0]. r186993: 2012-04-30 Uros Bizjak <ubiz...@gmail.com> * config/i386/i386.md (and<mode>3): Change runtime operand mode checks to compile-time "mode == <MODE>mode" checks. (and splitter): Ditto. r188630: 2012-06-14 Uros Bizjak <ubiz...@gmail.com> * config/i386/i386.md (*zero_extendsidi2): Remove x,x alternative. (*zero_extendsidi2_rex64): Ditto. Remove isa attribute. r188634: 2012-06-14 Uros Bizjak <ubiz...@gmail.com> Fix my previous commit to: * config/i386/i386.md (*zero_extendsidi2): Remove x,x alternative. (*zero_extendsidi2_rex64): Ditto. Remove isa attribute. r188648: 2012-06-14 Uros Bizjak <ubiz...@gmail.com> (*zero_extendsidi2_rex64): Remove isa attribute. Modified: branches/google/gcc-4_7/gcc/ChangeLog.google-4_7 branches/google/gcc-4_7/gcc/config/i386/constraints.md branches/google/gcc-4_7/gcc/config/i386/i386.md
